Half duplex frequency division duplex support in non-terrestrial networks

Abstract

Disclosed are methods, systems, and computer-readable medium to perform operations including: determining a scheduling conflict between an uplink transmission and a downlink reception; determining a type of the scheduling conflict; and applying, based on in part on the type of the scheduling conflict, a prioritization rule that prioritizes at least a portion of the uplink transmission or the downlink reception in order to mitigate the scheduling conflict.

We claim: 
     
         1 . In a wireless communication system comprising a non-terrestrial network (NTN) serving a user equipment (UE) that supports half-duplex frequency division duplex (HD-FDD) mode, a method to be performed by the UE, the method comprising:
 determining a scheduling conflict between an uplink transmission and a downlink reception;   determining a type of the scheduling conflict; and   applying, based on in part on the type of the scheduling conflict, a prioritization rule that prioritizes at least a portion of the uplink transmission or the downlink reception in order to mitigate the scheduling conflict.   
     
     
         2 . The method of  claim 1 , further comprising:
 receiving the prioritized portion of the uplink transmission or the downlink reception.   
     
     
         3 . The method of  claim 1 , wherein determining a type of the scheduling conflict comprises:
 determining that the type of the scheduled conflict is a conflict without repetition in the uplink transmission and the downlink reception.   
     
     
         4 . The method of  claim 3 , wherein the prioritization rule prioritizes between the uplink transmission and the downlink reception based on respective priority indices associated with the uplink transmission and the downlink reception. 
     
     
         5 . The method of  claim 4 , wherein applying the prioritization rule comprises:
 comparing the respective priority indices; and   determining to prioritize the communication with a higher priority index.   
     
     
         6 . The method of  claim 4 , wherein applying the prioritization rule comprises:
 comparing the respective priority indices;   determining that the respective priority indices are identical; and   in response, performing one of a plurality of alternative options, the alternative options comprising: (i) prioritizing the uplink transmission, (ii) prioritizing the downlink transmission, (iii) prioritizing the uplink transmission or downlink transmission based on configuration, and (iv) prioritizing based on respective reception times of grants associated with the uplink transmission and the downlink reception.   
     
     
         7 . The method of  claim 1 , wherein determining a type of the scheduling conflict comprises:
 determining that the type of the scheduled conflict is a conflict with repetition in at least one of the uplink transmission or the downlink reception.   
     
     
         8 . The method of  claim 7 , wherein the prioritization rule prioritizes between the uplink transmission and the downlink reception based on respective priority indices associated with the uplink transmission and the downlink reception. 
     
     
         9 . The method of  claim 8 , wherein the downlink reception includes repetition, and wherein applying the prioritization rule comprises:
 determining whether the respective priority index of the downlink reception is lower than the respective priority index of the uplink transmission;   if the respective priority index of the downlink reception is lower:
 performing one of a first plurality of alternative options comprising: (i) prioritizing a first portion of the downlink repetition without time overlap with the uplink transmission, while a second portion of the downlink repetition with time overlap with the uplink transmission is not prioritized, (ii) determining not to prioritize the entire downlink transmission, and (iii) prioritizing a third portion of the downlink repetition before the time overlap with the uplink transmission, while the downlink repetition on or after the time overlap with the uplink transmission is not prioritized; and 
   if the respective priority index of the downlink reception is greater:   performing one of a second plurality of alternative options comprising: (i) prioritizing the first portion of the downlink repetition without time overlap with the uplink transmission, while the second portion of the downlink repetition with time overlap with the uplink transmission is not prioritized, and (ii) prioritizing the entire downlink repetition.   
     
     
         10 . The method of  claim 1 , wherein determining a type of the scheduling conflict comprises:
 determining that the type of the scheduled conflict is a conflict that involves a time overlap between an existing communication configuration and a newly scheduled communication.   
     
     
         11 . The method of  claim 10 , wherein the existing communication configuration is the uplink transmission, wherein the newly scheduled communication is the downlink reception that overlaps in time with the uplink transmission and that is scheduled by a dynamic grant, and wherein applying the prioritization rule comprises:
 determining that a last symbol of a control resource set including the dynamic grant is no earlier than a threshold time before a first symbol of the uplink transmission; and   responsively prioritizing the uplink transmission.   
     
     
         12 . The method of  claim 10 , wherein the existing communication configuration is the downlink reception, wherein the newly scheduled communication is the uplink transmission that overlaps in time with the downlink reception and that is scheduled by a dynamic grant, and wherein applying the prioritization rule comprises:
 determining that a last symbol of the control resource set containing the dynamic grant is no earlier than a threshold time before a first symbol of the downlink transmission; and   responsively prioritizing the downlink transmission.   
     
     
         13 . In a wireless communication system comprising a non-terrestrial network (NTN), a user equipment (UE) that is served by the NTN and that supports half-duplex frequency division duplex (HD-FDD) mode, the UE comprising:
 one or more processors configured to perform operations comprising:
 determining a scheduling conflict between an uplink transmission and a downlink reception; 
 determining a type of the scheduling conflict; and 
 applying, based on in part on the type of the scheduling conflict, a prioritization rule that prioritizes at least a portion of the uplink transmission or the downlink reception in order to mitigate the scheduling conflict. 
   
     
     
         14 . The UE of  claim 13 , the operations further comprising:
 receiving the prioritized portion of the uplink transmission or the downlink reception.   
     
     
         15 . The UE of  claim 13 , wherein determining a type of the scheduling conflict comprises:
 determining that the type of the scheduled conflict is a conflict without repetition in the uplink transmission and the downlink reception.   
     
     
         16 . The UE of  claim 15 , wherein the prioritization rule prioritizes between the uplink transmission and the downlink reception based on respective priority indices associated with the uplink transmission and the downlink reception. 
     
     
         17 . The UE of  claim 13 , wherein determining a type of the scheduling conflict comprises:
 determining that the type of the scheduled conflict is a conflict with repetition in at least one of the uplink transmission or the downlink reception.   
     
     
         18 . The UE of  claim 13 , wherein determining a type of the scheduling conflict comprises:
 determining that the type of the scheduled conflict is a conflict that involves a time overlap between an existing communication configuration and a newly scheduled communication.   
     
     
         19 . In a wireless communication system comprising a non-terrestrial network (NTN) serving a user equipment (UE) that supports half-duplex frequency division duplex (HD-FDD) mode, a non-transitory computer-readable storage device having stored thereon instructions, which, when executed by a data processing apparatus, cause the data processing apparatus to perform operations comprising:
 determining a scheduling conflict between an uplink transmission and a downlink reception;   determining a type of the scheduling conflict; and   applying, based on in part on the type of the scheduling conflict, a prioritization rule that prioritizes at least a portion of the uplink transmission or the downlink reception in order to mitigate the scheduling conflict.   
     
     
         20 . The non-transitory computer-readable storage device of  claim 19 , the operations further comprising:
 receiving the prioritized at least a portion of the uplink transmission or the downlink reception.